Adding and substracting machine.



No. 696,4I5. Patented Apr. I, I902.

W. A. DAY.

ADDING AND SUBTRAGTING MACHINE.

(Application filed Nov. 10, 1898.)

(No Model.)

WITNESSES /N VENTOI? W6, dial/x47 62 U ATTORNEY.

UNITED STATES PATENT OFFICE.

IVILLIAM AUSTIN DAY, OF KEARNEY, NEBRASKA.

ADDING AND SUBTRAOTING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 696,415, dated April 1, 1902. Application filed November 10, 1898. Serial No. 698,106. (No model.)

To aZZ 2072 0722 it may concern.-

Be it known that 1, WILLIAM AUSTIN DAY, residing at Kearney, in the county of Buffalo and State of Nebraska, have invented certain useful Improvements in Adding and Subtractin Machines; and I do hereby declare that the following is a full, clear and exact description thereof, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to an improved adding and subtracting machine.

The object of my invention is to provide a machine which shall be so simple of construction that it can be made cheap enough to come within the reach of the great majority of shopkeepers and others desiring a simple device adapted to be used as a cash-register.

In the accompanying drawings I have shown in Figure 1 a top view of the face-plate, with portions broken away, of an adding and subtracting machine embodying my invention. Fig. 2 shows a rear view of the faceplate. Fig. dshows an enlarged detached detail of one of the indicators. Fig. 4 shows a central. sectional view of the dial as used, while Fig. 5 shows a detail of the operating key as used in my invention.

My invention comprises, essentially, a faceplate which is provided with a main duplex dial comprising the graduated circles 1 and 2, the one marked 2 being positioned higher than the one marked 1, as is illustrated in Fig. 4:. Connected with this duplex dial is a second dial 3, provided with graduations beginning at O and ending at 9, as is shown in Fig. 1. Positioned above this dial 3 are three additional dials, marked 1, 5, and 6, which all have a O at one point, and which dials are provided with the numerals from 1 to 9, the two dials and 6 having theirnumbers read from right to left, while the central dial 5 reads from left to right, each of these dials, it has been stated, being divided into ten divisions.

Working centrally within the main dial 1 is a shaft 7, which extends through the faceplate A, which faceplate may be of anysuitable size, provided with a suitable housing. To this shaft '7 is secured above a wheel. 8,

which wheel is provided near its peripheral edge with one hundred small openings, as is shown in Fig. 1, where a broken View of the wheel 8 is disclosed.

The inner dial 1 is graduated into one hundred parts, reading from left to right, while the upper dial 2 is divided into one hundred parts, the graduations, however, reading from right to left.

\Vorking centrally within each of the dials 1, 5, and 6 is a shaft marked, respectively, b, c, and c, as shown in Figs. 1 and 2. To the shaft Z) upon the upper side is secured an indicator O, to the shaft 0 is secured in indicator I), while to the shaft 6 is secured an indicator E. Upon the rear the shaft 6 is provided with a pinion e0, having ten seatings. The shaft 0 is provided with a pinion i1, having ten seatings, while the shaft 1) is provided with the ten-seated pinion 42, as shown in Fig. 2.

Secured to the rear of the face-plate A is a pin :0, which pin works through a slot 52 within the bar 51, which bar 51, by means of a pin 52, is secured to a crank 53, forming part of the shaft 7. At its forward end this bar 51 is provided with a nosing 50, adapted to work into the seatings of the pinion 12, as is shown.

Extending from the pinion 4:2 is an arm 13, the forward end of which is adapted to work into the seatings of the pinion 4:1.

Extending from the pinion 41 is a bar 45, secured to the pinion by means of the pin 44, and this bar 45 is provided with an extending nosing, adapted to work into the seatings of the pinion 40.

lVhen the wheel 8 is turned to the right, the rod 51 is actuated to intermittently engage the pinion b to revolve the same in the direction of the arrow adjacent thereto. In its revolution this pinion would carry about the arm 43, which arm is adapted to engage the pinion 11 to revolve the same in the direction indicated by the arrow positioned adjacent to this pinion. This pinion in its revolution would be adapted to actuate the pinion 40 by means of the nosing 46 engaging the same. These wheels are so arranged, however, that one full revolution of the main wheel 8 carries the pinion 42, and consequently the indicator, forward one division.

It would, however, take ten movements of this pinion 42 before the pinion 4:1 and its connected indicator are moved forward one point, and, finally, it would take ten movements of the pinion 41 to advance the pinion 40 and the indicator E one division.

The wheel 8 is provided with a plurality of small openings 10, (shown in Figs. 1 and 3,) into which the end of the pin 36 may be inserted.

From the above description it will be seen that my invention embodies, essentially, the main wheel 8, the inner circle 1, graduated from left to right,the adjoining circle 2, graduated from right to left, the intermediate indicator B, working in a circle 3, graduated into ten divisions from left to right, and the three indicators working within the circles c, d, and e, the first and last being graduated into ten divisions from right to left, while the central indicator D is graduated from left to right, The main wheel 8 is rotated by placing the operating-pin in any one of its one hundred openings, this pin then being adapted to actuate the indicator B by virtue of the star-shaped wheel 30, which wheel has ten seatings,referring now to Fig. 3, and the prongs of which star-wheel 30 project inward beyond the line, of the openings 10, so that the operating-pin K when inserted will come in contact with one of the points of this starwheel. This star-wheel is mounted upon a stub-shaft 31, which is positioned within a slot 19, below the circles 1 and 2, as is shown in Fig. 4, this shaft 31 further being provided with a pinion 32, meshing with the gear-sector 34,forming part of the indicator B, mounted upon the shaft 35, as is shown in Fig. 3. A simple plate A, as is shown in Fig. 1,.is used to hide this sector 35. v

The operating-pin K preferably has a stem divided into two diameters, the first diameter 37 snugly working into the openings 10 and the plate 8,while the sectional pin-section 36 is adapted to come into contact with the points of the star-wheel 30.

The operation of my device will be as follows: The first rule in using this machine is that all the indicators point to zero, this including the indicator 9, forming part of the main wheel 8. Now suppose we are to add five dollars and eighty-two cents and eight dollars and five cents. Thefirst operation would require that the indicator-hand B be pushed forward until it came opposite the numeral 5, because that is the amount of hundreds or dollars to be added. The operating-pin K is then placed in the opening passing through the indicator 9, when the plate 8 is rotated to the right until said plate 8 is kept from further rotation, which will be the case Whenever the indicator 13 comes in contact with the stop 13, there being two stops, the other being marked 13 and checking the movement of the indicator B into an opposite direction. The five revolutions of the wheel 8 will have advanced the indicator 0 five divisions, so that it points to the numeral 5. As the next operation the operating-pin K would be placed into the opening opposite the figure 82, as marked upon the inner ring 1, and then the wheel 8 would be carried forward until the pin engaging one of the prongs of the star-wheel which is being held in a locked position so that the indicator 9 upon the wheel 8 would come opposite the numeral 82 upon the outer circle 2, so that from this it will be noticed that the amount of the units and tens will be indicated upon the outer circle 2, while the tens, hundreds, and thousands of dollars would be indicated by the registers C, D, and E. To add eight hundred and five to the amount registered, the operator would first carry forward the indicator B opposite the numeral 8, representing the number of dollars to be added, and then place the indicator K within the opening of the wheel 8 opposite the zero and carry the wheel around eight times. The 0perating-pin K would next be placed opposite the 5 on the inner circle 1, and carried to the right until the movement of the wheel were checked,when an inspection would show that the indicator had' advanced to the numeral 1, the indicator 0 were opposite the numeral 3, while the indicator 9 rested op- V posite the numeral 87, showing that thirteen dollars and eighty-seven cents had been registered or added.

We will assume, for instance, that we wish to subtract eighty-six cents from the amount above registered. To do this, the operator would place the pin K in the hole opposite the 86 on the outside circle and push the circle 8 to the left until the indicator 9 had clicked once, this clicking being caused by the pin coming incontact with the star-shaped wheel 30. Afterclicking the wheel 8 would have to be pushed back to zero and then moved to the right until it locked, when the indicators on the various dials would register $13.01. This machine can be made at a very slight cost, so that it can be bought by the general public. The invention is further noticeable because of its extreme simplicity, and,

' Having thus described my said invention,

what I claim as new, and desire to secure by.

United States Letters Patent, is-- 1. The combination with a face-plate provided with a main duplex dial, an auxiliary dial, three additional dials adjacent to said auxiliary dial, all of said dials being suitably graduated, a shaft extending through said' main dial, a wheel secured to said shaft provided with a plurality of small openings, a stub-shaft centrally within each of said additional dials, an indicator secured to each of said stub-shafts, said stub-shafts being in gear connection, a supporting-pin secured to said main dial, a bar secured to said pin, a crank secured to said bar, said crank being secured to a suitably-supported shaft, said" bar Working into said wheel provided with said openings, as and for the purpose set forth.

2. The combination with a suitable supporting-housing provided with a main duplex dial, an auxiliary dial, and three additional dials, of the following instrumentalities, to wit: a pivoted indicator Working within said main dial provided with a gear-sector, a pinion Working in oonj unction with said gear-sector, a star-shaped Wheel secured to said pinion, the points of said wheel engaging said main indicator-wheel,a pitman extending from said crank, an indicator Within each of said additional dials, a pin secured to each of said ill- 

